Re-bar corrosion mapping

GPR can locate corrosion potential zones before delamination occurs.

Corrosion caused by chlorides is one of the main causes of damages to reinforced concrete structures and is responsible for most of the repair costs.

The GPR (Ground Penetrating Radar) method can quickly map at reasonable cost, areas of corrosion on large surfaces such as bridges, overpasses and parking lots.

The amplitude of the reflection at the interface between two materials depends on many factors such as the difference in material properties, particularly the difference in their dielectrics, the amplitude of the transmitted signal or the radar signal attenuation in the material above the interface.

Radar signal attenuation and depth of penetration, closely dependent on the electrical conductivity of the scanned concrete. When concrete has high electrical conductivities, the radar signal is converted to leakage currents, which increases the signal attenuation and reduces the attainable depth of investigation.

Moisture and chloride content of the concrete have a direct influence on the signal attenuation and amplitudes of reflections transmitted to the GPR antenna.

Mapping of corrosion levels areas, with the GPR method, is based on this principle, and areas of different corrosion potential are mapped according to the amplitude of the reflected radar signal on rebars and / or on the asphalt /concrete interface.

corrosion in concrete
reinforced concrete corrosion
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reinforced concrete corrosion detection
reinforced concrete corrosion detection 2
  • Fast service, even for distant deployments
  • Day and night service
  • Professional work
  • Use of high resolution GPR
  • Map of the corrosion levels
  • Detailed report

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Montréal 514 993-1254
Québec 418 262-1263
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